At the end of the day she is not "normal" or "average" and forcing her to be so will be more disastrous than following her leading (I know having watched it happen to my niece and nephew). We knew preschool was not going to be able to meet DS's academic needs at all so we looked for a non-academic, purely play based one where DS could develop socially (and kept following his lead at home) and then have skipped him into gr 1. He will need more than this soon but we will cross that when we need to.
All the best, it's an isolating experience as it is, even more so when there is no-one at home to talk with about it.